White streaks on dipstick after oil change?

Did an oil change on my 2017 v6 yesterday, and when checking the oil right after completion, there were white/milky-looking streaks in the oil on the dipstick, but only on one side of the dipstick- apparently the side that rubs against the tube's angle when pushing the dipstick down. Checked the oil again and same thing. I checked the oil by starting the engine, idle for around 2-3 minutes, then shut it off and check.
If it makes any difference, I had the oil filler cap, dipstick, and drain bolt all removed for a couple hours, while I left the drain pan under the truck , did the oil filter, and went to work on another vehicle. It wasn't humid/moist or raining outside at all, so it's not like water got in the motor.
I will check the oil again and see what happens. I haven't driven the truck yet since changing the oil, just moved it 4 feet.
Pretty sure I've seen this happen on another vehicle before after changing oil, can't remember what it was. Why would there be white streaks in the oil, and is it a concern?
For reference, used mobil1 extended performance 0w20, mobil1 m1c-251 extended performance filter.

 

Milky oil can happen in the winter with condensation from the motor cooling and short trips. A good 30min+ drive will burn off all the vapor.

The other cause could be coolant getting into the oil.

 

Yeah, probably just a little condensation in the tube, or oil/water in the elbow bend.
If all the oil that drained out look normal I wouldn't worry about it.
If it drained out all milky in the pan then I agree coolant in the oil.

 

Most likely from short trips in cold weather. My oil catch can looks like it has coffee in it in the winter due to the mixing of the white with the oil.

 

I agree with all above, probably condensation

 

I would make note of the level and run it a bit while you check the exhaust for any white smoke or if you smell anything sweet around the engine and If all is well, just keep an eye out by checking periodically.

I doubt you have an issue its just best to err on the side of caution.

Only other thing is I would recommend is to never leave the oil filler wide open, but put a shop towel with a rubber band while you drain the oil. You never know what may crawl down there.

Adios,